Registering and recording device.



J. G; ROBERTS.

REGISTERING AND RECORDING DEVICE.

APPLICATION FILED 112030. 1916.

Patented Aug. 20, 1918.

9 SHEETSSHEEY 1.

J. G. ROBERTS.

REGISTERING AND RECORDING DEVICE.

Laws?" 63 Robe/4's APPLICATION FILED DEC. 30, 1916.

Patented Aug". 20, 1918.

9 SHEETSSHEET 2- J. G. ROBERTS.

REGISTERING AND RECORDING DEVICE.

1,2769570, APPLICATION FILED DEC. 30. i916. Patented Aug.

9 SHEETSSHEET 3- v Ra SR n 5n 3% J. G. ROEERTS.

Patented Aug. 20, 1918.

9 SHEETSSHEET 4 REGISTERING AND RECORDING DEVICE. N Mm APPUCATIQN FILED DEC- 30, 19'6- L,@,57Q.

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Q m 4 WWW 7 0 mw mm Z m M W i M w W m J J Q Q 1 Qw/ w .I. G. ROBERTS.

REGISTERING AND RECORDING DEVICE. APPLICATION FILED 05c. 30, I9I6.

1,276,570., Patented Aug. 20, 1918.

9 SHEETS-SHEET 5- 9': 9*: s p wag-qr ms NOHR'S s-zrsns ca. PNGTO-LIYND. WASMINGWN. n. c.

1. e. Beams. REGISTERING ANDRECOHDING DEVICE.

APPLICATION FILED DEC. 30' l9l6 Patented Aug. 20, 1 918.

9 SHEETS-SHEET B m: Mamas m-vsas m, PNulO un J. G. ROBERTS.

REGISTERING AND RECORDING DEVICE.

APPLICATION FILED DEC- 30,1916.

ltlhllll fiw %TATE% PATENT @FldlQE.

JOHN G. ROBERTS, OF DOBBS FERRY, NEW YORK, ASSIGNOR TO \VESTEBN ELECTRIC COMPANY, INCORPORATED, 015 NEW YORK, N. Y., A CORPORATION OF NEW YORK.

REGISTERING AND RECORDING DEVICE. 1

To all who)! it may concern:

it known that 1, JOHN G. Ronmrrs, a citizen of the United States, residing at Dobbs Ferry, in the county of Vestchester and State of New York, have invented certain new and useful Improvements in Registering and Recording Devices, of which the following is a full, clear, concise, and exact description.

T his invention relates to registering and recording devices and particularly to recording devices applicable to telephone exchange systems. The present is a division of application, Serial No. 823,094, filed March T, 191% which matured into Patent #1218505 issued March 13, 1917.

The object of this invention is to provide a simple and efficientmechanism for the rapid recording at the central office of subscribers line numbers.

One feature of the invention resides in a sectional call-recording mechanism. The several sections of this mechanism are provided each with a plurality of similarly lo cated recording members, and the recorded as a whole is provided with a plurality of actuating devices equal in number, preferably, to the recording members in each section. Each actuating device is, moreover, operative with respect not only to some one or more of the recording members of one section. but also to the recording members correspondingly located in the other sections. By this mechanism the numbers of subscribers lines. are automatically registered one after another in the several sections thereof, and means is provided for automatically shifting in unison all of the actuating devices so that they are operativcly associated with the recording mem' bers in the several sections in rapid succe... on as the calls are received.

The call-recording mechanism heretofore referred to is preferably user. in an automatic call-distributing system whereby at the moment a subscriber is calling the recording mechanism receives and records the number of the line calling. while at the same time the line is automatically and instantly connected to an idle call-receiving apparatus. Each. section of the recording Patented Aug. 20, 1918.

I Original application filed March 7, 1914, Serial No. 823,094. Divided and this application filed December 30,

Serial No. 139,816.

mechanism is associated with a particular call-receiving apparatus. The two opera tions mentioned, which, as stated, take place simultaneously at the moment the calling subscriber lifts his receiving telephone to initiate a call, are followed immediately by a shifting movement of the actuating devices of the call-recording mechanism, which prepares the nextidle section thereof and the corresponding call-receiving apparatus for receiving the next call. Whenever any calling line number is thus recorded and the line thus ext-ended, that number may be made manifest in any desired manner at the location of the corresponding call-receiving apparatus. For example, in the semi-automatic system each call-receiving apparatus would be associated with an operators position, and the number of the line would be made manifest, if desired, by means of a visual register displayed at that operators position. The actuation of the visual register if used may be made very rapid but it is not necessarily instantaneous. The registra ticn may be accomplished by suitable stepby-step mechanism acting after the call is received by the recorder and after the shiftinn operation has taken place to provide for subsequent calls.

Briefly stated the operation of the system is as follows: As the subscribers calls come in their lines are distributed and instantly connected to diflerent idle call-receiving apparatus. and their numbers are simultaneously and instantly recorded on corresponding sections of the recording mechanism. A shifting operation takes place immediately after each call is received to prepare the next idle call-receiving apparatus and the corresponding section of the recording mechanism for the next call. Any one call-receiving apparatus and its corresponding section of the recording mechanism are retained in use by a calling line for a brief time only, this time being merely that required to set up a telephonic circuit through suitable switching mechanism between the calling line and the line wanted. In a man ual or a semi-automatic telephone system constructed according to this invention, the calling. subscriber may immediately upon lifting his receiving telephone dictate to the operator the. number of the wanted subscriber, and. the operator. noting that number orally and noting the number of the culling subscriber visually on the calling line number register, may by any suitable switching niechunisin connect the two lines together for telephonic communication, whereupon the originul instruction circuit and the calling line number recorder and register. being of no further use for that all, are restored to connnon use and thus made ready for subsequent calls. In the system described in this application the switching means for setting up a telephonic circuit between the subscriber is the usual cord circuit of manual switchboard system. It. is apparent.however. that the. invention is of broad scope and can be utilized in other telephone systems using other forms of connecting circuits and switching apparatus.

The particular einl'iodinient of the invenherein described will be understood by reference to the accompanying drawings wherein Figures 1, 2 and 3. when placed with Fig. above and Fig. 1 to the left of 1;. o

i lustrative of a system or :iretus;

Fig. lillustrates an HlQYEIRl lTG circuit arrangement to that of Fig". 1;

Fig. 5 is a pictorial view of a tour-division recording device;

Fig. 6 is a simplified circuit diagram illusi the principle of the subscribers conof the call recorder;

' 7 a view in elevation of the first or lowermost division oi? the recur-oer, certain parts being shown broken away and other to parts in section.

Fig. 8 a plan riew of the some shown in section along: the line S- of T with the frame broken away; i

is a View in e erntion of one of the the rem we other than the first;

1.: a plan. in section of the repart broken nwa c:

. is 21 detail oi n couuuutntor formthe ct-order:

ectivc view a spring the recorder. 21

o a pinion Fig. 9

and :iireguienturv iruction let c of on i :ulupted for extendto on idle l'tt'ZQlYlllQ a inas ectire "view of o s u to the circuits established for telephonic corn- 5 inunicatlon.

The recording system ??H cncml.

The purpose of the recording nieciianisf l is to make temporary note of :ubscribcr. line numbers. it is not essential that the number be usually registered by this mechanism, but merely that some l'QCOl'C be impressed upon it which can be teniporuri 'r retained and be translated or asceitainet or made use of i some way or another. In the present application the recording niecl anisin is shown applied to u cull-distributing s stein in such. a way that it records tle numbers of the calling li ice. in my Patent 0 EOlQO-l tied Qctober 17, 1916, a similar mechanism is shown as applied to the recording of "minbers of the lines wanted. The operation of this mechanism in the large telephone exchange systems it is usual to divide the equipment into a numer 0t otlices. each otiice h; ving a. cupacit or 10.000 subscribers lines, and in such it sys- .111 the number of each subscribers line, ,5

other than the character or number indicating the oihce, comprises tour nunie his. A

calling line number recorder for such an office would have four divisions (see one for eucii order of numerals the sul scribers numbers: Div. 1 being for the thousnnds numerals, Div. 2 for the hundreds Div. 3 for the tens, and Div. for the uni s. in order that a plurality of calls, which may conic into the olice in rapid succession, may be recorded and the several records maintained for e sutlicient length of time to perniit their being utilized or made note of the recording mechanism is divided into as many sections the trerlic retpiires. in tact, each of the tour divisions is dirided in o the required iiuinberot sectim 1. Six such sections are proi ded in the recording;

inecl enisiu shown in I:

its will appear hereinafter l 1 our dtsiii mu 1 oi operation. any calling lslir'if'tilfi' l number. suv Bio. 3-4313. would be recorded ut S( from the de- 1' in l statement mic one seci in, say section 1, by indicating the i'UONEnUH'lilllHPDl in section 1 of Div. 1: ti e hun- L20 of the actrat in; ..5 reoruer is at once sniitted b a common 1. to inc-chi W w e W: P c

niein bllOo n at the lelt our of in lg so that these members will operate to record the next succeeding call in section 2, or in case section 2 already contains a recorded call not yet utilized or made note of, in the next idle section.

The general system of circuits for controlling the operation of the recorder, when applied to the recording of calling subscribers numbers in an office of 10,000 lines, may be briefly explained by reference to Fig. 6, wherein the recording points, 2410 in all (sixty in each of the four divisions), are arbitrarily arranged in a manner to facilitate the explanation. Each division has ten controlling magnets 21, one for each of the numerals 0 to 9, and therefore forty such magnets in all. Each magnet controls an arm or shaft 47 operative at siX recording points, one in each of the six sections. All of the forty magnets are at any one time operative in some one section only, say section No. 1. Twenty of these magnets, those of the thousands and tens groups, have each one coil terminal connected through the coil of a central magnet 217, common to the recorder, to one pole of a battery 214, while the other twenty magnets, those of the hundreds and units groups, have each one coil terminal connected to the other pole of the battery 21% which may be ground. The opposite coil terminals of all of the forty magnets are connected each to an individual busbar or wire to which various branches lead to contact points of subscribers line relays 117. There is associated with each subscribers line one such line relay adapted to be energized upon closure of the line circuit at the hook switch contact 199 when the subscriber is calling. Relay 117 has two sets of normally open contacts 160, 158 and 163, 161. It will be noticed that in Fig. 6 the four contact points 160, 158, 163 and 161 are shown as connected respectively to the busbars or the following recording magnets: No. 3 of the thousands group, No. 4 of the hundreds group, No. 8 of the tens group, and

No. 5 of the units group, these numbers corresponding to the four numerals of the subscribers line number 3485. The operation, briefly stated with reference to Fig. 6, is as follows: )Vhen the subscriber lifts his re ceiver to call, the relay 117 is energized over circuit including the central oiiice battery 17-), the two windings 180 and 18 1 of the relay 117. the subscribers line wires 176 and 177, and the switchhook contact 199, and by reason of the pass-by or make before break contact arrangement of this relay, two local circuits are momentarily closed: one including ground, hundreds magnet N0. 4,, branch wire 4,00, relay contacts 161, 163,

branch wire 3000, thousands magnet No. 3,

control magnetfl 217 and battery 214; the other including ground, units magnet No. 5,

branch wire 5, relay contacts 158, 160, branch wire80, tens magnet No. 8, control magnet 217 and battery 214:. This results in an indication by some suitable means, such as the displacement of small levers 38 (see Figs. 7 and 8) of the numerals 3, i, 8 and 5 in sections 1 of divisions 1, 2, 3 and 4, respectively, of the recorder. The manner of indicating this number 34185 in section 1 of the recorder is graphically indicated by the short diagonal lines representing displaced levers 38 in Fig. 6. At the moment this recorder is established in section 1, the control magnet 217 is energized and sets into operation the mechanism (the shafts 47) for transferring the control of the actuated members of all the recording magnets 21 to the next idle section.

The rule with respect to the connection of the contact points of the line relay 117 to the busbars of the recording magnets may be stated as follows: the contact points 168, 161, 160 and 158 of each line relay are connected to the busbars of the particular recording magnets in the thousands, hundreds, tens and units groups, the numbers of which correspond to the thousands, hundreds, tens and units numerals respectively of the sub scribers line number. Applying this rule again, for example, to subscriber whose line number is 8903, the contact 163 of his line relay 117 would be connected to magnet No. S of the thousands group, contact 161 to magnet No. 9 of the hundreds group, contact 160 to the magnet No. 0 of the tens group, and contact 158 to magnet No. 3 of the units group. .It will be seen, therefore, that by this simple arrangement, a single set of forty recording magnets will serve 10,000 subscribers and successively record their line numbers as fast as they initiate calls to the central office.

The recording mechanism.

A form of mechanism suitable for recording the numbers of calling subscribers lines is shown in detail in Figs. 5 and 7 to 12 inclusive. It comprises among other devices, the recording electromagnets 21 (shown also in Fig. 6), ten in number and designated 0 to 9 in each division, or forty in all; a series of stop electromagnets 22, six in number, one for each section and designated 22 to 22 inclusive; a spring motor device 23; an electromagnet 24 for winding the spring of the motor, and pairsof stepping and releasing magnets 25, 26, six of these pairs being located in each division (one in each section thereof) or 2 1 pairs in all.

The various electromagnets mentioned and the devices associated therewith and con trolled thereby are supported upon a frame which comprises four main trunk members 27, centrally located in line with each other,

one below each division of the recorder. To the lower end of the lowermost trunk 2? i fixed a base plate and at the upper end 0: ea h trunk 2'? is a plate 29. ini circular plate is attached to each trunk 2 and supports ten of the eleei'roinagnets Eittending upwardly from the base plate 28 and parallel to the lowermost trunk is a post This post supports a circular plate on which the six electroinan'net's 22 to 99f are mounted; it also supports at its upper end the spring motor device Projectingupwardly from the top of the lowermost trunk 2? and having a hearing "therein a and has a bearing in each of the trunks 2'7. At the lower end of each division, slightly above the plates 29, is a plate 35, and at the upper end thereof a plate l'leld hetween plates and and arranged in semicylindrical grid formation, is a series of ntal bars These bars lie parallel to the shaft are equally distant therefrom. and are separated from each other sufticiently to pr vido spaces therebetwee for the pivoted recording levers 38.

There are ten of these levers ach diviuon; therefore, sixty ion and 24.0 in all, il e1 to and are in fact the s indicated in the diagram, ten levers in each section of arranged in a semi-circle and point radially toward the shaft. hey are held in place by and pivoted to the w res 3. which are drawn tautacioss the bars There one pivot wire for the ten levers 38 in each section of each division or in all.

Each of the pivoted recording levers 38 is formed of a. thin piece of spring inetal bent into a shrtpe one arm thereof being longer than the other arm The lever thus formed is sprung into its place in the space between. the bars 3? and its two arms bear with slight pressure against. the inside edges of these bars. The longer arin er;- tends inwardly beyond the inside surface of the bars and is twisted to about d5 dcl he purpose of th twist, which is fully explained hereinaiter. is to faate the restoration of the levers to normal i ition after bein displaced to record a numeral of a subsc ibers line number. The short arni d3 of the lever is formed with a slight projection to frictionallv he edoe of the adjacent bar 37. s iall em to and to project laterally from the lor er arm and engage the outside surface of 7 adjacent bar a in order 'to limit the rocking movement of the lever on tion of c eiare ll, ten in number in each division or 40 in all. Each of these shafts is in line with one of the electroinagnets 21, and each is capable of a limited endwise movement through the plates and 86 and also through a pinion d8 and the plate 29. At the end of each shaft 47 below the plate is an armsture or plunger 51, which is integral with the rod and is adapted to be attracted to the core 50 of the electroinagnet 21.

lhe shaft d? (see Fig. '13) is provided with a longitudinal slotor lzeyway 190 in which a key 191 is inserted This key is attached to the pinion by means of a rivet in order that the shaft l? may be given a turning movement by the pinion without d' ilacing the pinion. Normally the shaft 7 is retained in the position shown in Figs.

. a. and S by a retaining spring 52, which forms one of the arms of a spider In any one of its siz; positions. the shaft 4? will place one of the pins 54: adjacent the upper end of a lever 38. Then upon the energization of the corresponding electromagnet 21, this shaft will be displaced endvvise, bringing the pin into engagement with the lever and rocking the latter so that its outer end will slant upwardly instead of downwardly.

All of the ten pinions s8 which are in each division of the recorder are engaged by a gear wheel 55 keyed to the shaft between the plates 36 and 29. i i pinion 56 engages the gear wheel 55 in the first division and thus drives in unison the shaft 34:, the four gears and the forty pinions 4:8. This pinion :56 is keyed to a shaft- 5'? hearing in an extension piece 58 of the plate 36-; and also in the plate 29 and in the stem 82. There is keyed to this shaft a dish 59 on the periphery of which and insulated therefrom is contact ring 61 covering the whole surface of the disk, except a small section 62 which is of insulating material. A contact brush supported on an arm til of the frame, but insulated therefrom, bears upon the contact ring 61. Fastened to the disk is a stop pin 198, the function of which will be presently explained. A pin 65 also secured to this disk supports the outer end of a .piral spring 66. The inner end of this spiral spring is fastened to a huh til which is inte 'ral with a disk 68 and a pinion 69. The hub 6?, disk 68 and pinion are adapted to turn freely and together on the shaft 57 as a bearing. D11 the outer surt dish 68 is a contact ring Ti face or L116 7 which brush 7:2 bears;

This contact brush is fastened to the arm 61 of the frame and like contact brush 63 is insulated therefrom. The contact ring 71 carries a brush 7 which normally rests on the periphery of the disk 59 at the insulating section 62 thereof. Engaging the pinion 69 is a small gear 74 which is fixed to a short shaft extending through the plate 29 and supporting on the other side of the plate a ratchet wheel 7 5. This ratchet wheel is provided with a retaining pawl 76 and a driving pawl 7 7 the latter being pivoted to the armature '78 of the magnet Armature 78 is pivoted to an extension piece 79 of a bar 81. This bar is a part of the frame, extends the whole length of the mechanism and is fastened by screws 215 to the plates 29 in each division.

Each pair of magnets 26 with their arnnitures 83 and 81 respectively, together with the stepping and retaining pawls 85 and 80 comprise a step-by-step mechanism for advancing and releasing a ratchet wheel 87. There are twenty-four such ratchet wheels in the recorder. one for each section of each division. Each ratchet and its contact-carrying arm 89 are formed integrally with a hub 88 supported on a metal sleeve 90 which surrounds the shaft 31. The arm 89 carries a pair of contact springs 91 and 92. the latter resting normally against the insulating stud 501 attached to an angular extension 93 of the arm. The contact s Jrings 91 and 92 are connected respectively to spiral conducting and retracting springs 94- and 502, the outer ends of which are fixed to an insulating pin 95 on the side of the arm. 89. and the inner ends of which are secured to an insulating sleeve 503 on the metal sleeve 90.

The arm 89 is shown in Fig. 8 in its normal position resting against a rod 504, and in Figs. 7 and 9 in an off-normal position to show its position with respect to the levers 38 as it passes them. The sleeve 90 extends between the plates and 36 and is fastened at each end in a hub .305 by set screws 506. The rod -1 also extends between and is supported by the plates 35 and 36.

Each of the six electromagnets 22 has an armature 96. A lever 97 to which the armature is secured is pivoted at 98 in a slot in the circular plate 33, and rests at its upper end in one of six peripheral slots in a circular plate 99 secured near the upper end of. the stem 32. The lever 9'? extends slightly above the plate 99 in position to be engaged by the pin 193 in the disk 59.

Underneath the base plate 28 of the frame are two groups of six sets of contact springs arranged radially bout the lower end of the shaft 57 Fig. 11). In the group nearesplate 28. each set comprises contact springs 201, 202,203 and 201. Springs 203 and 20% are normally in contact with each other while springs 201 and 202 are normally separated. An angular extension 205 of spring 203 is in position to be engaged by an insulating pin 206 carried by a lower extremity 207 of the lever 97. Carried by, but insulated from, shaft 57 are a brush 208 and a feed ring 209 and electrically connected with each other. Bearing on ring 209 is a contact brush 212 supported by, but insulated from. a bracket 213 attached to plate 28. In the lower group of contacts each set comprises contact springs 511 and 512 normally in contact with each other. An angular extension 513 of spring 511 is in position to be engaged by a second insulating pin 51a carried by the lower extremity 207. A. brush 516 and feed ring 517 are carried by, but insulated from, the shaft 57 and electrically connected with each other. Brush 208, ring 209, brush 516 and ring 517 are secured rigidly on shaft 57 by means of screw 211. Bearing on ring 517 is a contact brush 518 supported by, but insulated from, bracket The arrangement for the operation of these sets of contacts is such that each of the magnets 2 controls one set of springs in each of the two groups, and when its armature 96 is attracted the insulating pins 206 and 51-1 engage, respectively, extensions and and thereby open the contact between springs 203 and 20a and between springs 511 and 5.12 and close the contact between springs 201 and 202. The brushes 212 and 518 serve to conduct current to the two brushes 208 and 516, respectively, in any position of the latter two, which make contact, in six angular positions, with six springs 20% and 512, respectively.

A constant force is exerted on the disk 59 by means of the spring 66, tending to rotate it on the shaft 57, but normally the disk is prevented from rotating by the engagement of the pin with the end of the lever 97 of one of the six electromagnets22. When this lever is withdrawn, however, the disk moves forward with a snap until the pin strikes the next lever 97 that is in normal position. This carries the contact ring on the disk 59 beyond the point where the brush 73 rests on the insulating segment 62 and a circuit which will be described hereinafter in connection with Fig. 2) is closed which energizes intermittently the electromagnet 24. This magnet thereupon oscillates its armature causing its pawl 77 to drive the ratchet wheel 7 and step around the gear wheel 74. The latter, by engagement with the pinion 69, drives the disk 68 up to the point where the brush 7 5 again rests on the insulating segment 62. In this manner the spring 66 is kept wound up so that the disk 59 is always caused to advance to a new position when the lever holding it is withdrawn.

lVhen the disk 59 is advanced one step in ing upwardly from the armature 128 is a pin 132 to which one end of a retactile spring 133 is attached, the other end thereof being attached to a U-shaped strip 134 secured at each end to the side strips 116.

For operating each contact set 103, 101, 105 and 106 at the intersections of the shafts, there are provided two arms, one a fiexible arm in the form of a spring wire 1&5 carried by shaft 102, and a rigid arm 146 attached to shaft 101. The arm 145 is protected from displacement by a rigid arm 1&7, the latter being directly attached to the shaft 102 and the former attached to the latter at a point near the shaft. The arm 147 is turned down at its free end over a right-angle extension 148 of the arm 1&5, and at the free end of this extension the arm or wire is formed in an upturned half loop 1 19, which is adapted to engage the recess 150 in the arm 116. The contact set 103, 104:, 105, 106 carries. a headed insulating plug 151 inserted in a hole near the end of spring 103, the head 152 resting on that spring and the lower end of the plug resting on spring 101.

The magnets 117 and 118 are controlled by the circuits shown in Figs. 1 to 1.

In the operation of this switch mechanism some one of the outgoing lines, such as 109, 110, will be prepared for subsequent connec tion to any incoming line. One of the magnets 118 is normally energized holding its armature attracted and its shaft 102 in angular displacement. Therefore, each of the flexible arms 1-15 carried by this shaft will be swung to the left bringing its half looped end 149 directly over the head 152 of the contact set and beneath the rigid arm 116 of the shaft 101. Upon the subsequent closure of one of the magnets 117 the lever will rock the corresponding shaft 101 causing the rigid arm 14-6 to descend upon the end 149 of the flexible arm 1 15, pushing the latter against the head 152 of the contact set lo cated at the intersection of the two shafts 101 and 102 which have been displaced. In this manner the springs 103 and 101 are brought into contact with springs 105 and 106, respectively, and connection is established between the incoming line wires 107, 108 and the outgoing line wires 109, 110.

At the moment the connection just described is made the outgoing line shaft 102 may be released and another shaft 102 displaced to prepare another outgoing line in condition for subsequent connection to any incoming line. The end 149 of the flexible arm 145 now fits snugly between the arm 114.6 and the head 152 of the contact set, and is held there by the recessed arm 116 after the shaft 102 is restored. In this manner the contact set is maintained operated merely by the continued displacement of the incoming line shaft 101. It will be noted also that while the incoming line shaft is displaced the subsequent displacement of any outgoing line shaft .102- will not result in the operation of the contact set located at the intersection of those shafts, for the reason that the end 110 of the flexible arms 145 will notentcr between the arm 1&6 and the head 152, but will strike the edge of the arm 14:6 and be held in that position until the line shaft 101 is restored.

The system.

The system of call distributing, as illustrated in Figs; 1, 2 and 3, will now be de scribed, assuming, for example, that sul scriber whose line number is 31285 is calling. Portions of the recorder are represented in Fig. 2, in a manner to facilitate the description of the system rather than to indicate the structural features. The recorder is ready to receive the record of the calling line number at some one of its idle sections, and the preselection of a recorder section dctermines which of the operators will receive the next subscribers call. The position of pin 193 of the disk 59 of the spring motor 23 determines the position of the brush 516 which now is in contact with one of the six contact springs 512. A circuit is therefore closed while the apparatus is at rest for the corresponding one of the outgoing line ma nets 170 (of which there would likewise be six) of an automatic switch 171 (1 ig. 11, as follows :--from grounded battery 510 (Fig. 2), brush 518, contact ring 517, brush 516, spring 512, spring 511, wire 215 (Figs. 2, 3 and 1), and magnet 170 to ground. This magnet 170 corresponds in every respect to the magnet 118 shown in Fig. 11;. Being thus energized it prepares the automatic switch 171 for instant connection of any one of the incoming lines on which a call should appear, such as the line 109, 110, to the preselected outgoing line 301, 302, leading to an idle operators telephone equipment (Fig. .3).

In each of the other live positions of the spring motor 23 the brush 516 would be resting on some other spring 512 and a cir cuitsimilar to the one previously traced would be closed to some other magnet 170 of the switch 171, and thus preselect other line conductors like 301, 302, leading to another idle operators telephone equipment.

There are shown in Fig. 1 two automatic switches, the switch 171 just referred to and another one, 172, associated more directly with the subscribers lines. This switch 172 is likewise prepared for operation, 2'. 6. preselected by the normal energization through a branch of an extended starter wire of one of its outgoing line magnets 118. This magnet receives current in the following circuit :from grounded battery 173, back contact 174: of an incoming line magnet 175 of the switch 171, and magnet 118 to ground.

Switch 1?? thus prepared for connecting any one oi? a number of calling subscribers lines, such as line 176, 1. 7, to the outgoing line conductors 109, 1.10 leaclin to switch 171. The extended starter Wire systei-n, it ill be uotecl leads from the battery 1x3 to he front contacts of all or the magnets 175 u a row beginning with the one nearest to he batte y when the; are jointly energized, and iinally through the back contact of the first iclle magnet to the corresponding out magnet 118 of the switch 172.

I I l This subscriber all in the usual Way by lifting receiver from the svitchhooh and by "sing a circuit as follows: from grounded tettery 170 to \vinrliin;- 180 of an incoming of the svvitch 1T9.

Clo

of the line cutotl' 182, line if. the telephone apparatus and oh. contact 190 at. substation 178, 1713, bacl: contact 16 5 of th cutotl and a s coiul Winch 7 to ground. This 7 "cc one ates the set 10%, 105 loca ed ie two rocking shaits 1 controlled by the es; ectively. This exincoming into tl caning line, the complete circun through this magnet at this time being from grounded battery 179, through ivirulingg 180, back contacts 181 and 185 of the cutoll relay 1S2, conductor 10S, contact springs 101 t 06 conductor 10, magnet uctor contact springs 105 anti 175, cono conductor and Winding 18- to ground. Ma net 1'75 is therefore nnm'erh- 1'37 1 in ci'inzluctoi. through springs 18?) i 188, conductor 301, Winding 30% oi the repeatingcoil 305 relay 303, Winding 306 of ale re eating}, coil. conductor 302,

7 to conductor 109. The 172 and 171 it 13 thus noted niain'anie l actuated by the ener- L 1 'ng? and 1 gizetion of ther incoming; line mag e s 11'? anti iii". The outgoing line magnets 11S and 170, however, inuoecliately become (leeaersz'izec 13 former i reason of the opening of bacl; contact '-l of magnet 17:, and the latter by the shining oi the commutator brush 5310 of the recorclcr in a manner to be presently stated. it is furthermore to be notetl. that magnets 11?, anal relay 30 3 are now maintained cue 'gizecl inclep 'lltlWli) i of control by tne subscriber u'uctthoi 'h 7 e r l he HIZIV now hung uo his teleoaonecnniot W v L 1 a Q I n that act break clown the circuit cstabnsherl t )llifll the su'itcl-ies 172 and 171.

nelay 303 becoming cner cuit just traced clos s a ci 307, through a call signa attracts the attention the rel-av also closes to hatter 210 connected to spring for subsequent closure a entl traced t hroue'h spring; The culling subs riber 111a ing for the usual lluniber 13 I to the Waiting operator the 1l1Il1 subscribers line Vs'fillitl. telephone 300 is inductive through back contacts znu lav 313 and windings obi 1* repeating coil 305 with the i.

the telephone of the callin it the same moment hat i is thus switched to an idle o inent the rec' rilino' of l calling line takes place a the fort; magnets 21 is such as the Wire tlesin' and 2) to contacts or c 11"? associated with example magnet 0 all of the magnets from numbers 0000 to net 5 of the some (ii-" nectecl to springs 103 of? l o 117 of lines from nuinlgzers That is to 'ay, each of the nagu viclua'lly nuinberec 0 t thousands division of the nectecl to s rings 10 of all 0 117 assoc'aterl with those lines szritls numeral of Whose number i, I

the individual nuinber 4 Similarly the magnet 1- Oi tile/ division of the recorder connec springs of all of the magnets i ciatecl with those lines Whose hun nieral is ii the saine. Way the r 8 of the tens cliv'sion is connec ed I springs 100 of all of those lines the te numerals of Whicl is 8'. Anti the magnet 5 of the units division is connecte snrings 1.58 oi all of those lines. the units niuncral of which is 5. ihere is in cuirerl in accordance with this hire 1% for recording; calling line numbers ii a: ichange or" 10,000 lines. only forty recs; ing vvires lea ling it can contacts or" the line magnets to the forty recordinginag'ne It will be seen once that in such a system 12a each of these recording wires would be multipled to 1000 line magnets. In a 5,000line system the numbers of which run from 0000 to 4999 there would be required only 5 re-' cording wires in the thousands division, and thus only 35 such wires in all (as indicated in Fig. 1).

The operation of the switches 172 and 171 to connect a calling line to an idle operator equipment has been described and in this connection it remains to be stated just how the record is made of the number of that line. As previously stated, the magnet 117 is energized when the subscriber calls and connects the two sides of the calling line to the conductors 109, 110. This magnet also controls the contact set for producing momentary or pass by contacts in two recording circuits as follows: (one) from grounded battery 214 (Fig. 2), relay 217, common wire 218 (branching to each of the ten magnets 21 in the thousands division of the recorder), No. 3 of the magnets 21 in that division, recording wire No. 3000 (Figs. 2 and 1), contacts 163, 162 and 161 of magnet 117, recording wire No. 400 (Figs. 1 and No. 4 of the magnets 21 in the hundreds division of the recorder and common wire 219 to ground; (two) from grounded battery 214 (Fig. 2), common wire 222, No. 8 of the magnets 21 in the tens division, recording wire No. 80 (Figs. 2 and 1), contacts 160, 159 and 158 of the magnet 117, recording wire No. 5, No. 5 of the magnets 21 in the units division and common wire to ground.

Four recording magnets 21 are thus energized momentarily and four of the levers 38 are displaced in that section of the recorder which corresponds to the preselected operators position. These levers instantly establish a record of the subscribers line uumber3485and although the recorder mechanism is immediately shifted to prepare for the next call, this record remains and is taken note of in a manner to be presently explained. At the same instant that the four recording magnets 21 are energized, the relay 217 is energized and momentarily closes a circuit for a relay 224 from grounded battery 214, contact 225 of relay 217, brush 212, contact ring 209, brush 208, springs 204, 2033., relay 224 and contact springs 520, 521 to ground. Relay 224 thereupon closes a locking circuit for itself and for another relay 220 as follows: from grounded battery 227, relay 226, contact 228 of relay 224, relay 224 and springs 520, 521 to ground. Relay 226 is now energized; it has two sets of normally open contacts 229 and 231, each of which performs a distinct function. Coutart 229 closes a circuit for the recordershifting magnet 22 and a retaining magnet 229, conductor 234, magnet 232, conductor and magnet 22 to ground. The energization of magnet 22 withdraws the stop lever 97 from the pin 193 and allows the spring motor 23 to drive the recorder mechanism into position to take the next incoming call in its next idle section. The spring motor is driven as stated by the stepping magnet 24, which receives impulses from a constantly rotating interrupter 523 whenever a circuit connection is established between ring 61 and brush 73, sucha circuit being completed as follows: from grounded battery 524, interrupter 523, brush 63, ring 61, brush 73, ring 71, lead 525, magnet 24 and ground at 527. The energization of the magnet 232 prepares the number indicator for registering the number just recorded by the displaced levers. Contact 229 also closes a circuit for the retaining magnets 26 of the recorder from point 271 through branches 272, magnets 26, and ground at 522. The energization of magnets 26 prepares the recorder in the section where the record is established for the reg istration thereof by stepping magnets 25. The closing of contact 231 by relay 226 starts or prepares to stalt an interrupter system for advancing step by step the recorder arms 89 in the selected section and the indicator 233 in step therewith. The arms 89 hunt for the displaced levers and the indicator dials advance to positions which correspond to the positions of the arms when they engage the displaced levers.

The indicator may be any form of number registering device. As illustrated in Fig. 2 the indicator 233 may comprise a box frame 236, part of which is shown at the right end, the remainder being broken away to display the internal mechanism. Dotted lines indicate the general contour of this frame. The top or front face of it has four windows 237, 238, 239 and 241 through which the thousands, hundreds, tens and units numerals of the subscribers number may be displayed. Four numeral disks 242, 243, 244 and 245, semi-circular in shape and each showing along their peripheries the numerals O to 9. are fixed to spindles 246 and are adapted to be stepped around to display the numerals successively through the windows by means of the ratchet wheels 247 and stepping magnets 248, 249, 251 and 252. The retaining magnet 232 controls by means of a rod 253 a system of levers for retaining when the magnet is energized the ratchets and numeral disks in their advanced positions. Associated with the stepping magnets of the number indicator 233 are cutoff relays 254 adapted, when the corresponding arms 89 of the recorder engage the displaced levers, to open and hold open the circuits of the indicator stepping magnets. These cutoff relays are slow to *1 w erner o release so as to remain energized in a circuit which is intermittently closed.

has been noted that contact of relur 226' is closed. in circuit with this contact one or the alternate contacts 257 ot a cont'nuously operated ree or interrupter 9' is in series r. ith a d he opposite contact 25 contact 261 or o. lOCli'"g clay 2652 This ar ement is one adapted to time the closol the stepping circuit "for the recorder and indicator stepping magnets so to insure a full impulse. The interrupter 258 must first close at contact 257 a circuit -for the relay as follows: from grounded hatter 263, reec. 258. contactflil. contact a contact of relay 262, relay 262 1 l contacts -20, 521 oi therecorder. Rela thereupon closes a. locking circuit for it. from grounded battery 263, another contact of relay F362, relay 262;, and contactg. 521 to ground; and a contact 261 which prepares hie that point. The interrin succession oi imgulses to th relies ot the stepping; circuit. This circuh I p 7 conta t L59, cont-not 261 to a point fr which it hrenches to the step 'iing' magnets or. the several dirisi 3 one of tilt-:6 lllllllCllQE; being from the no. 266 to stepping magnet :25 or the thousands dirision, conductor 1243?, contact 268 ct. cutoll' relay 254land stepging magnet or the indicator $233 to ground. The other branches may he readily traced like manner, ll' hen the arm 85). off the t iousunds division, reaches the displaced lever 38 (No. in this case), four impulses will have been sent at this moment the s 'i. 92 ones the spring 91, closing a c oil relayQSl fro rounded contact contact spring 92. spring 91 and ground. Belay 25% not. ogens o a a 268 the branch through mngnct 9 and closer the branch again at contact so that the impulses are continued in t t hranch through the stepping magnet and the cu"'off relay 254:, while the indior dish 9 remains in its adv need nom J- V 4+ L1 1 WW ml $4 on snomni Lne thousands linniela. 3

ough the Wind r; in a similar inanthe other 6, 1s El -3. fill and are adjusted o show the numerals 1. S and 5 oh the Windows 239 and ill, reit The Whol or the e numb er S 3E80 l u scrihcr now displayed. ll hen ole-en ul 'are been sentin the stepping circ lit 89 the recorder (thousands t "ion engages the spring 520 c lire-cl; contact with s ic zi g circuits L 1 Lllell.

tact 32.6 of relay e03, conductor 216 (Figs. 3 and springs 201 and :2 (held in contact by the action of magnet conductor l, retaining magnet 23:2 of the indicator 1 l, conductor and magnet to ground. branch of this circuit. from point 271. through conductors Q79 maintains the retaining magnets :26 energized.

The operation up to this point takes place in a very brief interval following the removal of the subscribers receiver to call. Almost instantly the subscribers line had been connected by the switches 172 and 171 in circuit with the operators equipment and sinulltancously there with the record of the calling subscrihers line number hud been estah ishet in a. certain section of the recorder-the one assigned to that operators po ion. Following these operations, the iinpulses eleven in numhernre sent locally to the indicator this operation t-al'z ing place Wlilllll a fraction of a Second. The indicator 235 is located at the operatorls position to Whose equipment the calling; line is connected so that she knows at a glance whee line is calling;

The calling subscriber immediately after l run his receii'e-r may dictate to the Waitw operator the number of the euhscrihers O a direct circuit with the calling line the apparatus prei'ioulsly on circuit changes which take iii are as follows: it will he noted first iatcircuitv is established for the line cut- 182 (Fig. from grounded oatee i relay 322, supervisory lump 3J3 sleeve 82% of the plug 317, sleeve 1 jack 31S, cutod relay 182 and reground. The operation of 82 causes the restoration of and 171 by disconnecting battery 179 and the hridgethrough Windings 180 end 18% of the magnet 11? from the suhserihefis line, a id likewise causes the relay 303 (Fig. 3) to be restored. The latter opens at contacts 316 the locking circuit for the magnets 22, and 26 permitting the arms 89 of the recorder. the numeral disks of the indicator and the arm 9? to be restored. ie arms 89 of the recorder in moving back to their normal position restore the disnlnced levers 38 in the mnnner hereto- :tore e A lained. This section of the recorder is therefore non lree to he used for the registration of another call and the pin 193 will, when again advanced to that position, be stopped by the corresponding arm 97.

The operation of relay 322 and the restoration of relay 303 result in a circuit being closed for the operation of the listening key 319 as follows: from grounded battery 307 through contact 358 of relay 303, contact 359 of relay 322, contact 361 of relay 362 and magnet 363 of the listening key 319 to ground. The operation of the listening key is thus automatically brought about by the insertion of the plug 317 in the multlple jack 318 of the calling line. A circuit is now closed for the relay 313 from grounded battery 326, conductor 327, contact 328 of the listening key 319, conductor 329, and relay 313 to ground. This relay 313 now opens contacts 311 and 312 disconnecting the operators telephone set 309 from the secondary windings 314 and 315 of the repeating coil 305 and connecting it in bridge of the cord circuit as follows: from the point 331, contact 332 of the listening key 319, conductor 334, contact 335 of relay 313, the operators telephone set 309, contact 336 of relay 313, conductor 337 and contact 338 of the listening key to point 339 of the cord circuit.

The operator now proceeds to complete the connection desired by inserting the calling plug 341 in the multiple jack of the subscriber wanted and signals that subscriber by depressing the ringing key 342. The insertion of the plug 341 closes a circuit for the cutofi relay of the called line like that previously traced to the cutoff relay 182 of the calling line and causes the energization of relay 362 which opens at contact 361 the circuit of the listening key actuating magnet 363 and restores the operators telephone to its normal connection with the secondary windings 314 and 315 of the repeating coil 305. When the subscribers are through talking and hang up their telephone receivers, the supervisory lamps 323 and 343 are lighted whereupon the operator may disconnect in the usual way by removing the plugs.

The busy test is established for the calling line before the operator plugs in the multiple jack. This is provided for the moment the receiver is lifted by the following circuit established by the operation of the line switch magnet 117: from grounded battery 179 (Fig. 1) resistance 197, contacts 164 and 165 of relay 117 and resistance 198 to ground. This raises the potential of the test sleeves of the multiple jack of that line and warns the operators when testing the line of its busy condition.

The talking circuit established between the calling subscriber and the operator through the switches 172 and 171, may be traced by reference to Figs. 1, 2 and 3, and is shown in the simplified diagram Fig. 15. It is as follows: from the subscribers switchhook contact 199, through the telephone set 178, line wire 17 6, resistance 196, contact 183 of cutofi relay 182, conductor 107, line switch contacts 103, 105, conductor 109, line switch contacts 187, 189, conductor 302, repeating coil winding 306, condenser 194, repeating coil winding 304, conductor 301, line switch contacts 188, 186, conductor 110, line switch contacts 106, 104, conductor 108, contact 185 of cutoff relay 182, resistance 195 and line wire 177 to contact 199. Across this talking circuit are two bridges: one including the winding 184 of line switch magnet 117, battery 179, the winding 180 of magnet 117 and contact 181 of cutoff relay 182; the other including the winding of line switch magnet 175. The operators telephone is inductively associated with this circuit by the repeating coil 305.

The talking circuit between subscribers may be traced in part in Figs. 1, 2 and 3, and in whole in the simplified diagram, Fig. 16, as follows: for the calling subscriber from grounded battery 321, winding 343 of the cord circuit repeating coil, supervisory relay 344, ring contact 345 of plug 317, ring contact 346 of jack 318, conductor 347, line wire 177, switchhook contact 199, subscribers set 178, line wire 176, conductor 348, tip contact 349 of jack 318, tip contact 351 of plug 317 and winding 352 of repeating coil to ground. The circuit to the called subscriber is the same except that the connection is made through the plug 341 and jack of the called line.

Whenever the operator has occasion to supervise a connection she may create a busy condition of her equipment to incoming calls by the act of listening in at any cord circuit on her position. In order to do this either one or the other or both of the plugs of a cord circuit must be in a subscribers jack, and under such a condition and pro vided also the operator has not at the moment received a call, the operator may close circuit for magnet 363 by pressing button 364, as follows: from grounded battery 307, through contact 358, contact 365 of relay 322 or contact 366 of relay 362 (or both), button switch 364 to magnet 363 and ground.

Whenever the listening key 319 is thus or in any manner operated, a circuit is established for the relay 313 as heretofore traced. This relay controls a contact 354 in the circuit of the magnet 22 as follows: from battery 355, through resistance 356, contact 354, conductor 273, conductor 235, and magnet 22 to ground. As long as the listening key is held depressed this circuit will maintain the magnet 22 energized and therefore the lever 97 removed from the 

